Carbureter.



WJH. MUANDR WSJ CARBURBTER; APPLICATION FILED JUNE 21, 1913.

,QQS SQZS, Patented Apr. 14, 1914.

2 sums-SEEM 1.

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W. H. MO ANDRBWS'.

CABBUBETEE.

APPLIUATIOH FILED JUNE 21, 1013'.

Patented Apr, M, 1914. w

2. BHEETSSHEET 2.

WILLIAM MCANDREWS, OF CHICAGO, ILLINOIS.

CARBURETER.

Specification of Letters Patent.

Patented Apr. 11, it 9.1-1.

Application filed June 21, 1913. Serial No. 774,974.

To all whom, it 121 113 concern Be it known that I, VVILLIAM H. lMCAN-nnnws, a citizen of the United States of America, residing at Chicago,in the county of Cook and State of Illinois, have invented certain newand useful Improvements in Carburetors. of which the following is aspecification.

This invention relates to improvements n1 carburetors of the fioatvalveor gravity feed type for internal combustion engines of various kinds,but particularly for gasolene. engines used for operating motorVehicles.

The principal and general object of the invention is to simplify andlITIPIOVG the construction, operation and efficiency of carbureters ofthis type.

Other objects are to provide a rarburcter which will afford a highvaporizing effect and thorough carlmriZat-ion, in such a. inalinor thatthe range of automobile operation will be greatly increased and, so thatthe carbureter will respond to all varia ions in operating conditions ofthe engine to automatically cause the preparation of the proper mixtureor gas supply for each condition; to afford means for supplying air andgasolene or hydrocarbon to the carbureter casing, and means foratomizing the latter, as well as, to cause it to be conveyed from thedischarging nozzles-therefor through circuitous and baflied passages orways to the engine, to the end that a more perfect commingling of airand gas or more thorough carl'mrization will be ettected.

Various other objects and advantages of the invention will be disclosedin the subjoincd description and explanation.

The invention consists in certain peculiar-- ities ofthe construction,novel arrangenn-nt and operation of the various parts thereof, as willbehereinafter more fully set :l .n-th

and specifically claimed.

in the. accompanying drawings. which serve to illustrate an emlmdimentolfltho invention-Figure 1 is a view partly in section and partly inelevation taken on line 1-1 ot' Fig.2, looking in the directionindicated by the arrows; Fig. 2 is a. plan view of the carburetershowing the cover for the air inlet turned or positioned to admit air tosaid 3 is a fragmented view, partly inlet; Fig. in section and partly'inelevation of a portion of the lower part of the casing, showing thedischarging nozzles for the hydroresponding parts throughout thedifferent views of the drawings.

The reference numeral 7 designates the casing of the carbureter, whichmay be of any suitable size, form and matcrialpbut preferably of metaland cylindrical in shape, as shown in Fig. 1. of the drawings. The upperend of the casing "Z, is open and is provided with an external annularflange 8. which secured to the lower surface of an annular flange v9,with which the upper portion of the air conduit or inlet 10 isprovidedhy means of screw bolts 11, and a ring 12, which latter islocated on the lower surface of the fial'ige 8, and screwed up againstthe same by means of the screws 11, which.

are passed through suitable openings in the flange t), on the airconduit or inlet. This flange 9 has extended upwardly therefrom atubular member 13, which is provided at its .t'ree end with a flange 14,adapted to be secured to a flange 15, on the pipe 16, leading to theengine or manifold (not shown). As shown in Fig. 1 the tubular member13, has an opening 17, through the flange S), and also has transverselyjoin-- nalcd therein a shaft 18. on which ismounted a butter-fly orthrottle-valve 19, to regulate the passage of the mixture or carburetedair from the carburetor to the engine. The shaft 18, and valve 19thereon, may be operated by means of a lever 30. mounted on said shaft,and a rod or connection 21, leading from said lever to the properpositiolr on the engine and in the usual or ori'linary manner.

lvlounted'ncar the 'lower portion of the casing 7, and preferablyconnected therewith by means o1 a bracket is a-iioatvalve casing of theordinary or any well-' known constrimtion, to which hydrocarbon may besupplied thri'rugh a nipple 24, which may be connected in any suitablemanner to Eisupply or gasolene or hydrocarbon (not shown). The lowerortion of the casing 7, is provided with a c anneled extension 25, whichhas communication through a pipe 26, with the float-valve casing 23, andthe channel of said extension is provided in its upper portion with avalve seat 27, which is closed by meansof a valve 28, on the inner endof a rod or stem 29, which is extended through a gland or follower 30,secured in or to the lower-portion of the extension 25, and which stemmay be operated so as to open and close the valve seat 27, by means of aknob or milled thumb piece 31 on the outer end of said'stem. Thefloat-valve casing and its valve is employed to maintain a constantlevel within thereservoir 32, of the carburetor casing, and the supplyof hydrocarbon to the float-valve casing 23, and

done in an sary herein to explain in detail the manner of such supplyandregulation. The reservoir .32, of the carburetor casing is producedor formed by the bottom of said casing and a conical or cone-shapedpartition 33, which is fitted at its periphery tightly to the bottom ofthe casing and its wall, as is clearly shown in Fig, 1 of the drawings,in which view it will be observed that the apex 34 of the partition 33,is located centrally with respect to the casing 7 of the carburetor.Extended through the partition 33, near its apex are a series ofhydrocarbon discharging nozzles 35, 36, and 37, the lower ends of whichare projected to near the bottom of the casin '7, and the upper ends ofwhich are curved ownwardly, as is clearly shown in Fig. 3 ofthedrawings, in which view it will be noticed that the upper ends of thenozzles 35, 36 and 37 are located in different horizontal planes.

Extended through a central opening in the head or fiange 9, andpreferably integral therewith is the air inlet pipe or conduit 10, whichis of sufiicient length to extend to near the bottom of the casing 7when positioned therein, as shown in Fi 1, and to encompass the centralupwardly extended portion of the partition 33, or top of the reservoir.The pipe or conduit 10, is provided at its lower end with anexternalannular plate 38, which is provided with nu- 55 merous minuteopenings 39, and between the late 38, and the head or flange 9, the airlnlet pipe or conduit 10, has located thereon a number of battle plates40, s1 and 42, each of which is provided with one or more 0 segmentalslots or openings 43, each of which openings is provided with foraminousmaterial 45, such as wire cloth of very fine mesh, which material may besecured to said plates in any suitable manner, so that 0.5 the air andgas or mixture will be caused the regulation of the valve therein can bewell-known or suitable manner, and for this reason it is not deemedneces-' to passthrough the openings of this fabric or perforatedmaterial. By reference to Fig. 4 of the drawings, it will beseen thatthe openings or slots 43, as well'as the material 45, over the same, arelocated alternately with respect to one another; that is, the openings.43 in the lower plate &0 .will be located directly beneath theimperiorate portions of the plate 41, while the openings 130f the lastnamed plate will be located directly beneath the imperforate portions ofthe plate 42, thus causing the fluids as they pass to be drawn upwardly.through the perforations 39, of the plate 38, to be baffled and causedto travel in a circuitous route or passageway to the member 13, and fromthence to the engine.

Pivotally mounted on the upper end of the air inlet 10, is a door orcover *6, which is employed for regulating the quantity of air admittedinto and through the inlet pipe 10, and in order to gage the quantity ofair so admitted the door .or cover 46, may be provided with an indicator4-7, used in connection with a scale 48, with which the upper'portion'ol the air inlet may be provided.

In the modified construction illustrated in Fig. 5 of the drawings, thecover 33 of the reservoir 32, is provided with a series of uprighttubular members 49, which extend to near the bottom of the casing 7, andare internally screw threaded at their upper portions to engage screwthreads on their respective nozzles, which nozzles are thus adjustablysupported on the cover of the reservoir, to the end that they may beraised or lowered by turning them in the proper direction, so that theirfree or discharging ends may be located at the proper distances from thecover of the reservoir. In'this loo modification the apex or centralportion of I the cover 33, is provided with an upright pipe or tube 50,of any suitable length which, by pretlarcnce, has its upper end flaredas at 51, to receive air as it passes downwardly through the air inletor con-- duit. This tube'b'O is provided with a cock or valve 52, havingan opening 53 to register with the bore of the tube 50, so as to permitthe air to pass freely through said tube, and

when desired the cock'52 can be turned so as to decrease the supply ofair passing through the tube 50, or shut it ofi' entirely, if desired.By this arrangement, itis obvious that the air is drawn downwardlythrough the air inlet, it w ll be caught by. the flared por tion 51, ofthe tube 50, and when the cock 52 is open, the pressure of the air inthe tube 50, will act on the hydrocarbon within the reservoir andv forceit upwardly through the nozzles.

From the foregoing and by reference to the drawings, it will be readilyunderstood and clearly seen that in the operation of the engine,suction, or" exhaust will be created in wcr end thereof and the partiii-"PU LllC:

tun; 5} or top of the reservoir for the by drug: 3011, in whichoperation it is evident that ii the engine is running a low speed mindthe pressure or suction is low, hydrocarbon or gasolene will be drawnthrough the nozzle 35, or shorter one, and that as the speed of theengine and the suction or pressure increases, hydrocarbon will bedischarged through the nozzle 36, or the one longer than the first namednozzle, and so on throughout the series of nozzles.v In this operationthe air brought down through the pipe 10, will be impregnated with thehydrocarbon and the carbureted air and will pass through theperforations 39, of the plate 38, and "from thence upwardly against thebathe plates 40, 41 and -l'2,and through the sieves or foramiuouscoverings of the openings in i said plates, thus atomizing thehydrocarbon and air, and causin the most perfect and boroughcarburization. As the hydrocarbon is discharged from the nozzlestherefor, it is evident that some of it will accumulate in the spacebetween the cover 33, of the reservoir, and the wall of the casing,which accumulated hydrocarbon will act for the purpose of priming theengine.

ll'hile I have shown and described my invention in its preferredembodiment, it will be understood that various changes may be de withoutdeparting from the scope of appended claims; for instance, the num ofdischarging nozzles for hydrocarbon be increased or diminished, and theii ier of ballle plates may be gre'ater or than those shown and abovedescribed.

so obvious that the details of conv be varied without departing it ofthe invention. a fully described my invention, 1 as new and desire tosecure by l i ll:

the combination with a in in its lowerpai t a reservoir and in its upperpart an to supply hydrocarbon to c an air conduit located in the tendedat its inner end to near the reservoir, and a plurality of'nuiniinicating at their lower ends reservoir and extended upwardly lwer part of id conduit and iavupper portions bent. :lowi'n'ardly.

mrlnueter, the combination with a mg in its lower part a reservoir to-.carlj\on and in its upper part an 7 v? means to supp hydrocarbon to 1-voir, an air conduit located in t 1 'l at its inner end to near rrvoir,an a plurality 0 ing a? .1 lower a with the reservoir and extendedupwardly into the lower part of said conduitand having their upperportions bent downwardly with their free or discharging ends located indifferent horizontal planes.

3. In acarbureter, the combination with a casing having in its lowerpart a reservoir for hydrocarbon and in its upper part an outlet, saidreservoir having a conical cover or top, of means to supply hydrocarlu'mto said reservoir, an air conduit located in the casing and extended atits inner end to near the top of the reservoir and surrounding thecentral part thereof, and a plurality of nozzles communicating at theirlower ends with the reservoir and extended upwardly into the lower partof said conduit and having their upper portions bent downwardly withtheir free or discharging ends located in ditferent horizontal planes.

4:. In a carbureter, the combination with a casing having in its lowerpart a reservoir for hydrocarbon and in its upper part an outlet, ofmeans to supply hydrocarbon to said reservoir, an air conduit located inthe casing and extended at its inner end to near the top of thereservoir, a plurality of nozzles communicating at theirlower ends withthe reservoir and extended upwardly into the lower part of said conduitand having their upper portions bent down 'ardly with their free ordischarging ends located in different horizontal planes, and a series offoraminous battle plates located horizontally and spaced apart betweenthe air conduit and the casing.

In a earbureter, the combination with a casing having in its lower parta reservoir for hydrocarbon and in its upper part an outlet, saidreservoir having a conical cover or top, oi": means to supplyhydrocarbon to said reservoir, an air conduit located in the casing andextended at its inner end to near the top of the reservoir andsurrounding the cent alpart thereof, a plurality of nozzlescommunicating atthcir lower ends with the reservoir and extendedupwardly into the lower part of said conduit and having their upperportions bent downwardly. with their free or discharging ends located inditlercut horizontal planes, and foraminous ballle plates horizontallyrated at distances apart between the air conduit and the casing.

(3. In a carburetor, the combination with a casing having in its lowerpart a reservoirfor hydrocarbon and in its upper part an outlet, ofmeans to supply hydrocarbon to said reservoir, an air conduit'centrallylocated in the casing and extended at its inner end to near the. top ofthe reservoir, a plurality of nozzles communicating at. their lower endswith the reservoir and extended upwardly into the lower part of saidcon- "uit and having their upper portions bout lhiwnwardly,1a perforatedplate horizontally outlet, said reservoir having a conical cover or top,of means to supply hydrocarbon to said reservoir, an. air conduitcentrally located in the casing and extended at its inner end to nearthe top oi the reservoir and surrounding the central part, thereof, aplurulity of nozzles communicatingat their lower ends with the reservoirand extended upwardly into the lower part of said conduit and havingtheir upper portions bent downwardly with their free or discharging endslocated in diil'erent horizontal planes,

a perforated plate surrounding the lower portion of the air conduit, aplurality of plates surrounding said conduit above the first namedplate, said plurality of plates having slots located out of registerwith one another, and foraininous material extended across each oi. saidslots. I

S. In a carhureter, the combination with a casing having in its lowerpart a reservoir for hydrocarbon and in its upper part anv outlet, ofmeans to supply hydrocarbon to said reservoir, an air conduit centrallylocated in the casing and extended at its inner end to near the top ofthe reservoir, a plurality of nozzles adjustably supported on the coverof the reservoir and co1un1unicating therewith at their lower ends andeX- tended upwardly into the lower part of said conduit and having theirupper portions bent downwardly.

9. In a carburetor, the combination with a casing having in itslowerpart a reservoir for hydrocarbon and in its upper part an outlet,of means to supply hydrocarbon to said reservoir, an air conduitcentrally located in the casing and extended at itsinner end to near thetop of the reservoir, a plur'ality of nozzles communicating at themlower ends with the reservoir and extended upwardly into the lower partof said conduit and having their upper portions bent down? wardly, atube communicating at its lower end withthe central portion of the top.of the reservoir and having its upper end enlarged, and a cock locatedimsuid tube to control the flow of air through the same.

10 In a carbureter,the combination with a casing having in its lowerpart a reservoir for hydrocarbon and iuits upper-part an outlet, ofmeans to supply hydrocarbon to said reservoir, an air conduit locatedin. the casing and extended at its innerend to near the top of thereservoir, a plurality of nozzles adjustably mounted on the top of saidreservoir and communicatin at their lower ends therewith and extendeupwardly into the lower'part of said conduit. and. having their upperportions bent downwardly, and a valved tube communicating at its lowerend with the upper portion of the reservoir and having its upper endenlarged.

11. In a carbureter, the combination with a casing having-a reservoirfor hydrocarbon in its lower portion, of means to supply hydrocarbonthereto and to maintain the supply of hydrocarbon at a constant level,an air conduit located in said casing and extended at its lower end tonear the top or cover of the reservoir, a plurality of nozzles extendedthrough the cover of the reservoir to near the bottom of the casing andextended upwardly into the lower part of said conduit and having theirupper portions bent downwardly with their free or discharging endslocated in different horizontal planes, and means for creating adownward passage of air through the air conduit and an upwardly passageof fluid between said conduit and the casing. a

WILLIAM H. MoANDRElVS. lVitnesses: CHAS. C. TILLMAN, A. S. PHILLIPS.

